/Engine/Source/Runtime/CoreUObject/Public/Serialization/BulkData.h
Get the CustomVersions used in the file containing the BulkData payload. If !IsInSeparateFile, this will be the custom versions from the archive used to serialize theFBulkData, which the caller must provide. Otherwise, the CustomVersions come from the separate file and this function will look them up.
void GetBulkDataVersions ( [FArchive](API\Runtime\Core\Serialization\FArchive) & InlineArchive, [FPackageFileVersion](API\Runtime\Core\UObject\FPackageFileVersion) & OutUEVersion, int32 & OutLicenseeUEVersion, [FCustomVersionContainer](API\Runtime\Core\Serialization\FCustomVersionContainer) & OutCustomVersions ) const